DETROIT (AP/WOOD) — Police say a 12-year-old Detroit boy who went missing for a dozen days before turning up in his own basement has been turned over to his biological mother.

Police say Charlie Bothuell V was released from the hospital Thursday after being evaluated. He was found Wednesday in the multiple-unit condo where his father and stepmother live near downtown Detroit.

According to a report from WDIV in Detroit, police believe the 12-year-old was in the basement the entire time he was missing and would only come upstairs when he thought the coast was clear in order to eat.

The boy’s father had been criticizing him about his weight and he was required to do 4,000 strides on an elliptical without a break, according to WDIV.

Investigators weren’t allowing the boy to have contact with his father Charlie Bothuell IV and stepmother Monique Dillard-Bothuell as they focus on circumstances surrounding his disappearance and recovery.

They haven’t responded to messages from The Associated Press seeking comment since he was found.

Police also said Thursday that Dillard-Bothuell was arrested on a probation violation related to a misdemeanor gun charge and her two children have been placed into Children’s Protective Services custody.